TEKNAF, BANGLADESH: Horrifying stories of gang rape, torture and murder are emerging from among the thousands of desperate Rohingya migrants who have pushed into Bangladesh in the past few days to escape unfolding chaos in Myanmar.

Up to 30,000 of the impoverished ethnic group have fled their homes, the United Nations says, after troops poured into the narrow strip where they live earlier this month.

Bangladesh has resisted urgent international appeals to open its border to avert a humanitarian crisis, instead telling Myanmar it must do more to prevent the stateless Muslim minority from entering.

The scale of human suffering was becoming clear Thursday, as desperate people like Mohammad Ayaz told how troops attacked his village and killed his pregnant wife.

Cradling his two-year-old son, he said military men killed at least 300 men in the village market and gang-raped dozens of women before setting fire to around 300 houses, Muslim-owned shops and the mosque where he served as imam.

“They shot dead my wife, Jannatun Naim. She was 25 and seven months pregnant. I took refuge at a canal with my two-year-old son, who was hit by a rifle butt,” said Ayaz, pointing to a cut on the boy’s forehead.

Ayaz sold his watch and shoes to pay for the journey and has taken shelter along with at least 200 of his neighbours at a camp for unregistered Rohingya refugees.

Many of those seeking shelter in Bangladesh say they have walked for days and used rickety boats to cross into the neighbouring country, where hundreds of thousands of registered Rohingya refugees have been living for decades.

The Rohingya are loathed by many in majority Buddhist Myanmar who see them as illegal immigrants and call them “Bengali”, even though many have lived in Myanmar for generations.

Most live in impoverished western Rakhine state, but are denied citizenship and smothered by restrictions on movement and work.

As the crisis deepened, Bangladesh said late Wednesday it had summoned the Myanmar ambassador to express “deep concern”.

“Despite our border guards’ sincere effort to prevent the influx, thousands of distressed Myanmar citizens including women, children and elderly people continue to cross (the) border into Bangladesh,” it said.

“Thousands more have been reported to be gathering at the border crossing.”

“They took women in rooms and then locked them from inside. Up to 50 women and girls of our village were tortured and raped.”

Mohammad said houses in his village were burned, echoing similar testimony from other recent arrivals.

Human Rights Watch said Monday it had identified more than 1,000 houses in Rohingya villages that had been razed in northwestern Myanmar using satellite images.

Jannat Ara said she fled with neighbours after her father was arrested and her 17-year-old sister disappeared, she believes raped and killed by the army.

“We heard that they tortured her to death. I don’t know what happened to my mother,” said Ara, who entered Bangladesh on Tuesday.

Rohingya community leaders said hundreds of families had taken shelter in camps in the Bangladeshi border towns of Teknaf and Ukhia, many hiding for fear they would be sent them back to Myanmar.

Police on Wednesday detained 70 Rohingya, including women and children, who they say they will send back across the border.

“They handcuffed even young girls and children and then took them away with a view to pushing them back to Myanmar,” said one community leader who asked not to be named, adding they faced “certain death” if made to return.